4rpl:commands:exists
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| 4rpl:commands:exists [2021/01/13 22:35] – created virgilw | 4rpl:commands:exists [2025/02/14 14:57] (current) – external edit 127.0.0.1 | ||
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| - | ~~NOTOC~~ | + | < |
| - | < | + | |
| - | === Syntax | + | ====== |
| - | -?VAR | + | |
| - | === Description | + | ===== Syntax ===== |
| - | Checks to see if VAR exists (has been assigned). If so, 1 (true) is pushed to the stack else 0 (false). | + | |
| - | === Examples === | + | -?VARNAME |
| - | <code 4rpl>if (-?triggered !) | + | |
| - | true -> | + | ===== Description ===== |
| - | endif | + | |
| + | Checks to see if a variable with name **VARNAME **exists (has been assigned). If so, 1 (true) is pushed to the stack else 0 (false). | ||
| + | |||
| + | ===== Examples | ||
| + | |||
| + | <code 4rpl> | ||
| + | if (-?TheAnswer) # checks if the variable exists | ||
| + | " | ||
| + | else | ||
| + | "We do not have the answer" | ||
| + | endif | ||
| </ | </ | ||
| + | |||
| + | ~~NOTOC~~ | ||
| + | |||
4rpl/commands/exists.1610577345.txt.gz · Last modified: 2025/02/14 14:56 (external edit)
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